A Bulk Dielectric Polymer Film with Intrinsic Ultralow Dielectric Constant and Outstanding Comprehensive Properties

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• 作者：Yiwu Liu ; Chao Qian ; Lunjun Qu ; Yunan Wu ; Yi Zhang ; Xinhui Wu ; Bing Zou ; Wenxin Chen ; Zhiquan Chen ; Zhenguo Chi ; Siwei Liu ; Xudong Chen ; Jiarui Xu
• 刊名：Chemistry of Materials
• 出版年：2015
• 出版时间：October 13, 2015
• 年：2015
• 卷：27
• 期：19
• 页码：6543-6549
• 全文大小：391K
• ISSN：1520-5002

文摘

A bulk dielectric polymer film with an intrinsic ultralow k value of 1.52 at 10 kHz has been successfully synthesized based on a novel polyimide FPTTPI. More importantly, such outstanding dielectric properties remain stable up to 280 掳C. The excellent ultralow dielectric properties are mainly because of the larger free volume (subnanoscale), which intrinsically exists in the amorphous region of polymeric materials. Meanwhile, FPTTPI also shows excellent thermal stability and mechanical properties, with a glass-transition temperature (T_g) of 280 掳C, 5 wt % loss temperature of 530 掳C, and a residual of 63% at 800 掳C under N₂. It was soluble in common solvents, which made it possible to undergo simple spin-on or efficient, low-cost, and continuous roll-to-roll processes.